{"product_id":"dbv150-genuine-deflecto-kensington-draft-blocker-valve-150mm","title":"DBV150 Genuine Deflecto Kensington Draft Blocker Valve 150mm, Backdraft Damper for Rangehood and Exhaust Fan Ducting","description":"\u003cp\u003eCold draughts falling out of a rangehood or exhaust fan usually mean the duct has nothing stopping air flowing the wrong way. The DBV150 is a Kensington draft blocker valve from Deflecto, sized for 150mm ducting. It goes into the duct run and only opens when the fan pushes air through. Measure your duct before ordering, since 150mm is only one of several common sizes.\u003c\/p\u003e\n\u003ch2\u003eHow a draft blocker stops backdraughts in your duct\u003c\/h2\u003e\n\u003cp\u003eWhen the rangehood or exhaust fan runs, the airflow pushes the valve's flap open and air leaves the house as normal. As soon as the fan stops, the flap falls closed and seals off the duct. That keeps out cold winter air and hot summer air, and stops dust, insects and outdoor smells working their way back down into the kitchen, bathroom or laundry. It also helps on windy days, when gusts can blow straight back through an open duct and make the fan rattle. Signs you need one are draughts under the hood, rattling noises and smells when the fan is off.\u003c\/p\u003e\n\u003ch2\u003ePart details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePart number DBV150\u003c\/li\u003e\n\u003cli\u003eKensington draft blocker valve from Deflecto\u003c\/li\u003e\n\u003cli\u003eSuits 150mm ducting\u003c\/li\u003e\n\u003cli\u003eOpens with fan airflow and closes when the fan stops\u003c\/li\u003e\n\u003cli\u003eFor rangehood and exhaust fan duct runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable class=\"part-specs\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003cth\u003eDuct size\u003c\/th\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eInstalling the DBV150 in your duct\u003c\/h2\u003e\n\u003cp\u003eSwitch the rangehood or exhaust fan off at the wall or circuit breaker before working on the duct. Fit the valve so the flap opens in the direction of airflow, away from the fan, and look for a flow arrow on the body. Join each end to the duct with clamps or foil duct tape so there are no gaps. Any rewiring of the fan is a job for a licensed electrician. Run the fan and check the flap opens fully and closes again.\u003c\/p\u003e\n\u003ch2\u003eQuestions about this part\u003c\/h2\u003e\n\u003ch3\u003eWhat size duct does the DBV150 suit?\u003c\/h3\u003e\u003cp\u003eIt's made for 150mm ducting. Measure your duct or the fan's outlet spigot before ordering. If yours is a different size, you'll need a valve made for that size or a reducer to suit, as a loose fit lets air leak around the valve.\u003c\/p\u003e","brand":"Deflecto","offers":[{"title":"Default Title","offer_id":44551393804366,"sku":"DBV150","price":29.73,"currency_code":"AUD","in_stock":true}],"url":"https:\/\/partsshop.com.au\/products\/dbv150-genuine-deflecto-kensington-draft-blocker-valve-150mm","provider":"My Store","version":"1.0","type":"link"}